AlgebraThe time a group of high school students arrive home from school each day was found to be normally distributed. The mean time was 3:15pm and the times had a standard deviation of 15 minutes. What is the probability that a student chosen at random arrives home from school ...
April 30, 2008

AlgebraFind a counterexample to the statement 4^n + 1 is divisible by 5...how do i show my work for this problem? The example in my book is too confusing it doesnt really go into detail but just shows a table.
April 30, 2008

scienceIf the San Andreas Fault, located in California, is to continue its activity, what does the future look like for that area? What precautions should be taken
March 12, 2008

ChemistryHey; I am doing a lab write up that has to do with NMR spectroscopy. Part of it asks to determine how many nonequivalent protons are in the compound 2-chloro-6-methylaniline, among other things. My problem is this is for kinetics class but this part of it has to do with ...
February 26, 2008

mathThe second equation is telling you what x is..since it says " x=2y-8" this tells you that wherever you see an x you can replace it with that equation, so you would get: (2y-8)+5y-10=0 so then you would just solve for y to get 18/7. So now you know what y is you can ...
February 26, 2008

ChemistryThat does help for at least seeing what the spectrum will look like, but I still don't get a few things...how do you know what the equivalent protons are? How do I know the coupling pattern? Would it be a triplet because it has 3 peaks..or is that something totally ...
February 11, 2008

ChemistryHey; I'm currently in a kinetics class and I am trying to do a prelab for a lab that we haven't learned the material for yet and I'm really stuck, and we unfortunately don't have a textbook for the class so I was hoping someone could help. We have the compound ...
February 11, 2008

American HistoryTo what extent might the mid-19th century belief in Manifest Destiny set the stage for the New American Imperialism at the end of the century? Can anyone please give me some hints to do this question?THANKS A LOT!
February 4, 2008

statisticsCalculate SS, variance, and standard deviation for the following sample of n=9 scores:2,0,0,0,0,2,0,2,0.(Note: The computational formula for SS works best with these scores.) I keep getting the wrong numbers. Thank You.
January 29, 2008

science1) In a syringe, what happens to the air paricles when you push the plunger? 2) In a syring, what happens the the air particles in the bubble from the bubble wrap when you pull up the plunger? 3) Are there more air particles in the bubble when it is compressed or when it is ...
January 24, 2008

Business MathTerry has an 18-month installment loan for $1,700 at 12% annual interest. Interest is compunded using the Rule of 78. Terry decides to pay back the loan at the end of the first month. 1. What is the total finance charge on the loan? The answer is $306, but I don't see how ...
January 14, 2008

Business MathCan someone please check over my answers? I'm not sure about them, especially part c. A small boat can be bought for $3,000 cash or on the installment plan by paying $300 down and $108 a month for 30 months. a) What is the installment price of the boat? $3,540 b) What is ...
January 14, 2008

ScienceEcological Surprises Do you believe the beneficial effects of spraying pesticides on Sabah outweighed the resulting unexpected and harmful effects? Explain.
December 28, 2007

InorganicHeyy, I have a quick question. I am doing binary systems, and I have a water/propanol system, and it says " 0.433 mole fraction propanol (71.7% propanol by weight)" does this mean that the mole fraction of water is 0.433 or propanol? Cause if propanol is 71.7% then ...
November 20, 2007

Inorganic ChemistryHello, I am trying to write a chemical equation for a reaction I did and I cannot for the life of me figure out how to do it. I added cobalt chlorid hexahydrate, NH4Cl, NH4OH, H2O2 and HCl. The major product was [Co(NH3)5Cl]Cl2 but I don't know what the other ones would be...
November 18, 2007

ChemistryHi; I'm just wondering, I need to write the dissocation equation for NH3 so that I can get Kb, and I just want to make sure that I am on the write track. I know that when some solids dissociate they just go from say CaCO3 --> CaO + CO2, but for this I'm wondering ...
November 12, 2007

scienceduring the mont f july its summer in virginia. where is it winter in july? north africa,argentina,or alaska
October 22, 2007

ThermodynamicsHi, I am trying to do a prelab and I am really stuck... I have no idea how to go about this, I don't knwo if its worded funny or waht, so any help would be greatly apprecaited. The question is: (This is for a bomb calorimeter of constant volume) Benzoic acid is often used ...
October 3, 2007

ThermodynamicsI am doing a lab and there is one question I can't get. We have the enthalpy of fusion of crystalline polyeythlene, mass, onset temperature and energy required for a phase change of both low density polyethylene and high density polyethylene. They as to calculate the ...
September 24, 2007

ThermodynamicsI am doing a lab and there is one question I can't get. We have the enthalpy of fusion of crystalline polyeythlene, mass, onset temperature and energy required for a phase change of both low density polyethylene and high density polyethylene. They as to calculate the ...
September 23, 2007

scienceWould it mean that the seasons of Winter and Summer would be longer and more extreme? As to how it might have an effect on the deflection of winds, I just can't figure that one out yet specifically. Length of days would not be effected, I think. If rotation speed was ...
September 18, 2007

scienceIf the earth's axis was tilted at 30 degrees instead of 23 1/2 degrees, how would that effect the seasons, or lengths of days, winds, etc. Or, would it have any effect at all?
September 18, 2007

Social Studies repost for bobI would also include: Remember that This Too Shall Pass Pray Focus on health: sleep, rest, nutrition Meditate Yoga Pretend you are a role model for a younger person (they are watching how you handle this tough situation) Remember: what counts is not what's happening TO you...
September 18, 2007

ThermodynamicsI;m going to run through this and see if I can get it and understand it, the only thing I have a question about is why are we changing the percents to 70 and 30?
September 16, 2007

ThermodynamicsHeyy, Okay so I have a question that I'm trying to figure out how to do and I'm really lost, I was hoping somebody might be able to give me a hand. Thanks in advance. The question in general is, I know that the vapour pressure of CCl4 is 98mmHg at 25 degrees C. This ...
September 16, 2007

Journal Entry of a Subordinate Group MemberI am with university of phoenix and I am having problems with the journal entry on subordinate group like what is listed at top of paper. I was trying to do it on Native Americans and I am not finding anything or maybe not going to the right site. please help.
August 26, 2007

readingi really need to know the them for "the face on the milk carton". can anyone help me? Thank you for using the Jiskha Homework Help Forum. Sorry, but your question is not clear. If you mean "the theme" it is to try to locate the missing children pictured on ...
August 6, 2007

readingi need to know what is the theme of the story "the face on the milk carton" Check these sites for information about themes in novels. Then you can make your own decision about the theme of The Face on the Milk Carton. http://www.thecore.nus.edu.sg/victorian/technique...
August 6, 2007

Calculusso we are doing integrals and I have this question on my assignment and I can't seem to get it, because we have the trig substituion rules, but the number isn't even so its not a perfect square and I jsut cant get it, so any help would be greatly appreciated. The ...
June 10, 2007

International businessYou are the chief executive officer of a multinationals subsidiary in a developing host country. The subsidiary has been in business for about eight years, making electric motors for the host countrys domestic market, with mediocre financial results. Before you ...
May 29, 2007

social studieswhat is the medical care like in a republic government? Is there any relation at all to medical care vs type of government? Didn't you believe me??!! http://www.jiskha.com/display.cgi?id=1177977129 =)
April 30, 2007

GovernmentWhat is the difference between a republic and democracy government? Democracy: http://www.answers.com/democracy Republic: http://www.answers.com/republic =) Thanks! What would the educational system be like in these ypes of governments? How would the people receive medical ...
April 30, 2007

ChemistryHeyy, okay I have this chemistry assingmnet and its on kinetics, and I got every single one except this one question and I've been trying for over an hour. I know that I'm probably jus tmissing something but everything I've tried doesnt work. Any help is greatly ...
March 20, 2007

mathhi, i need help with solving this equation for "y" 2x+3y=-2 2x+3y=-2 Get y on one side. Subtract 2x from both sides. 2x-2x+3y=-2-2x combine terms. 3y=-2-2x Divide both sides by 3. 3y/3 = (-2-2x)/3 y = ?? how do you get -2-2x to divide by 3? I would just leave it as...
March 11, 2007

eigenvalues/eigenvectorsFor the standard matrix { 1 -2 0} {-2 -1 1} {0 0 1} I found the eigenvalues to be -1, and +/- 5^1/2 I am having problems finding the eigenvectors of the root 5 values. Can someone set me straight?? Thanks
March 7, 2007

ChemistryHeyy, okay I have this question about chemistry and its driving me nuts. It feels like I am so close but am just missing something. The question is: A vessel of 6.84 L in volume contains 3.61 L of pure water at 25°C. A partial pressure of 3.67 atm of CO2 is quickly ...
February 3, 2007

Maybe you know this one..Heyy, I posted this before but it kinda got pushed down and ignored, and I was hoping maybe DrBob might have an idea since no one else did! okay I have this question about chemistry and its driving me nuts. It feels like I am so close but am just missing something. The ...
February 3, 2007

ChemistryHeyy, okay I have this question about chemistry and its driving me nuts. It feels like I am so close but am just missing something. The question is: A vessel of 6.84 L in volume contains 3.61 L of pure water at 25°C. A partial pressure of 3.67 atm of CO2 is quickly ...
February 3, 2007

ChemistryOkay so I'm doing an assignemtn and one of the questions has stumped me. It asks: The solid fuel booster rockets on the space shuttle employ a mixture of aluminium and ammonium perchlorate. The reaction is: 2Al(s) + 2NH4ClO4(s) â Al2O3(s) + 2NO(g) + 3H2O(...
January 21, 2007

Critical ThinkingWhat is the meaning of validity, truth, and soundness as they relate to the area of logical syllogisms http://www.memoriapress.com/articles/logic.html scroll to Truth, Validity and Soundness What is the meaning of validity, truth and soundness as they relate to the area of ...
December 17, 2006

trignometryuse degree measure for your answers. use a calculator and round the results to one decimal place for (c) and (d) (a) in triangle ABC, sin B = square root of 2 all over 2. What are the possible values for angle B? my thought: since sin is positive in the first and second ...
November 28, 2006

CalculusHey there. I have a quick question. Ive done questions like these before so I dont know whats stoping me. Anways the question is this: Find a point on the graph of y = x^2 with x>0 that lies closest to (0, 3). What is the x-coordinate of such a point? So I got 3^2 + y^2 = x...
November 17, 2006

sciencecan anyone direct me to a site or help me find a good science project? The best science projects are the ones invented by yourself. Find something to explore, and do it. One of my favorites is testing local drinking water for nasty things: lead, cadmium, bacteria, cloroform, ...
November 14, 2006

PHYSICS, PLEASE HELP TODAY!when it comes to chunks being ejected the masses are and velocities are 5kg(1737m/s), 10kg (184.3m/s), 100kg (1994m/s), 1000kg (2008m/s) What happens to the difference between the velocities as the number of chunks increases? What happens to the kinetic energy of the system ...
November 10, 2006

More related rates.Heyy, its me again. So last night I asked a related rate question, and I think I still don't get it. I tried it a few differnt ways and I think I'm just missing something...I don't think a speed of a rocket can be 0.018km/hr:S. So heres what happened: A camera, ...
November 3, 2006

Related rates,...againI also have another question (I'm not doing too good one these realted rates). A camera, located 2 km from the launch pad, is tracking the rocket that is fired straight up. When the height of the rocket is 20 km, the camera is rotating at the rate of 1/200 radians per ...
November 2, 2006

Related ratesHey, I have a question on related rates and I'm a little rusty at them. I have an idea how to do this one but at a certian point i get stuck. The question is: Two cars leave the intersection, the first travelling south at 40 km/hr and another travelling west at 90 km/hr. ...
November 2, 2006

CalculusOkay so I have a question on my assignment that says: You are given that tan(y) = x. Find sin(y)^2. Express your answer in terms of x. I know its derivatives, and I've tried taking the derivatives of both etc, and got them both to come out as cos(y)^2, which I know can be ...
October 21, 2006

CalculusOkay so I have the following question and I am totally stuck: Newton's Law of Gravitation says that the magnitude F or the force exerted by a body of mass m on a body of mass M given by F=(GmM)/r^2 where G is the gravitational constant and r the distance between the bodies...
October 12, 2006

ChemOkay so I have this assignment and I thought I knew how to do this but appearntly I am just lost. I know what the answer is suposed to be and I am deifantly no wheres near that. If you can sorta point me in the right direction that would be great. Thanks! The question is: The ...
September 24, 2006

ChemistryWe have been getting numerous questions like this on assignments and I can't figure them out. Its like I know that there some way connected but I can't figure it out. This is for Chemistry in highschool and its likea review and so they are not going over it but I would...
September 17, 2006

Calculus AssignmentHey there. Okay well I just started first year university and we got an assignment to sorta brush up our rememberance of everything and well...I'm not remebering to well. If anyone can help me with this question that would be great. Thanks. The secant method of finding a ...
September 12, 2006

sociologyI am in the same class eth/125.. still looking for the answer but thought I would say hi to the fellow Axia students.. HI good luck to all of you..
July 20, 2006

sociologyHow in the hell am I supposed to know what other measurements sociologist use to calculate prejudice. I can see this is going to be another weird class. I put I dont know,sorry.
July 20, 2006

ETH 125This is also my second week in eth125 at axia!!!! I cant believe I found others that are taking or have taken the same class as I am. Thanks for all your help everyone.
July 20, 2006

sociologyThis is so funny.I am attending Axia College also and taing ETH125 and COM215. I think the COM215 class is pretty difficult and I stress over the assignments. This site proves that great minds think alike.
July 20, 2006

Chemistry quick questionOk so a quick question. I have the equation Ca3(PO4)2 --> 3Ca+2 + 2PO4-3 Sorr its confusing, int he first part the 3 4 and too are all little numbers at the bottom, for the second part the +2 and -3 are small numbers at the top to show the charges. Ok so anyways the ...
June 20, 2006

Chem examI'm tyring to study for my chem exam and I cant figure out how to do this question: The solubility of MgCl2 is 54.25 g per 100ml of water at 25 degrees C. A student prepares a 2.50 mol/L solution of MgCl2 and states it is a saturated solution. Useing calculations determine...
June 17, 2006

RedoxWe have to write the balanced redox equation for this and this is the only one im stuck on. Incase theres another way to do it, we have to do it where you write all the oxidation numbers and then find out which one is reducaed which is oxidized, then write the half reactions, ...
June 13, 2006